Winware ALXP-1318 Commercial Half-Size Sheet Pans, Set of 2 (13-Inch x 18-Inch, Aluminum)

What gauge aluminum are the pans? Commercial grade means nothing to me. :(

Will it rust?

There is no nsf certification on the pan. if this is for commercial use, would it fail inspection due to the lack of label? why no label?

I accidentally washed the pan in the dishwasher and the glaze was destroyed. Should we no longer cook with this pan?